Synthesis and characterization of poly(N‐vinyl formamide) hydrogels—A potential alternative to polyacrylamide hydrogels
Synthesis and characterization of poly(N‐vinyl formamide) hydrogels—A potential alternative to polyacrylamide hydrogels
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聚（N-乙烯基甲酰胺）水凝胶的合成和表征——聚丙烯酰胺水凝胶的潜在替代品
DOI：
10.1002/pola.26401
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
S. Gehrke
中科院分区：
文献类型：
--
作者：
Tiffany C. Suekama;V. Aziz;Z. Mohammadi;C. Berkland;S. Gehrke
虽然n -乙烯基甲酰胺（NVF）是丙烯酰胺（AAm）和聚丙烯酰胺（PAAm）水凝胶的异构体，但其溶液浇铸成型凝胶的合成和表征尚未见报道。用新型交联剂2 - （N -乙烯基甲酰胺）乙醚和热激活引发剂VA - 044将NVF水溶液交联成凝胶。对于给定的配方，PNVF凝胶膨胀到与N，N ' -亚甲基双丙烯酰胺交联的PAAm凝胶的两倍。通过膨胀和压缩测量，发现PNVF凝胶比PAAm凝胶更亲水。Flory‐Huggins溶解参数为PNVF χ = 0.38ϕ2+ 0.48, PAAm χ = 0.31ϕ2+ 0.49，其中ϕ2为聚合物体积分数。PNVF和PAAm的剪切模量分别为φ和φ，符合良好的溶剂行为，也表明PNVF比PAAm更亲水。两种凝胶力学性能的相似性，作为一个函数的ϕ2表明PNVF和PAAm凝胶的网络结构是相似的。两种凝胶的断裂应变均以相同的线性函数随ϕ2减小，而无论配方如何，断裂应力均在500 kPa左右。由于NVF是一种液体单体，毒性比AAm小，而且可以水解成阳离子形式，因此PNVF凝胶在技术上具有重要意义。©2012 Wiley期刊公司高分子材料学报，2013
The synthesis and characterization of solution‐cast, molded gels ofN‐vinyl formamide (NVF) has not been previously reported even though NVF is an isomer of acrylamide (AAm) and polyacrylamide (PAAm) hydrogels have many commercial applications. Aqueous NVF solutions were cross‐linked into gels using a novel cross‐linker, 2‐(N‐vinylformamido)ethylether, and the thermally‐activated initiator VA‐044. For a given formulation, PNVF gels swell up to twice that of PAAm gels cross‐linked withN,N′‐methylenebisacrylamide. From swelling and compression measurements, PNVF gels were found to be more hydrophilic than PAAm gels. Flory‐Huggins solubility parameters were χ = 0.38ϕ2+ 0.48 for PNVF and χ = 0.31ϕ2+ 0.49 for PAAm, where ϕ2is the polymer volume fraction. The shear moduli for PNVF and PAAm scale with ϕ and ϕ respectively, consistent with good solvent behavior, also suggesting PNVF is more hydrophilic than PAAm. Similarity of mechanical properties for both gels as a function of ϕ2suggests that network structures of PNVF and PAAm gels are similar. Fracture strains of both gels declined with ϕ2by the same linear function while fracture stresses were about 500 kPa regardless of formulation. Since NVF is a liquid monomer, less toxic than AAm and can be hydrolyzed to a cationic form, PNVF gels could become technologically significant. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013
影响因子：
5.5
作者：
Lianjun Shi;C. Berkland
通讯作者：
Lianjun Shi;C. Berkland
DOI：
10.1021/jp111634k
发表时间：
2011-04-14
期刊：
The journal of physical chemistry. B
影响因子：
--
作者：
Smith MH;Herman ES;Lyon LA
通讯作者：
Lyon LA